Mama, this is really important, please call your OB or go to the hospital now, kahit gaabi to get checked. At 39 weeks with cramping, discharge changes, and belly/back pain, kailangan talaga ng doctor to make sure baby is okay and kung ready na kayo. I know it's scary as a first-time mom, but better safe than sorry, your OB needs to see you in person to know what's happening. Don't wait, ha? Keep us posted!